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Speed tape is sometimes used to protect sealant while curing, [4] or to patch non-critical components of an aircraft. [1] It can also be used for patching bullet damage to combat aircraft. [5] [6] Use of speed tape should be authorized by engineering teams, and has to comply with certain requirements.
"We looked out of our window and saw this," the caption reads on the original video, which zooms in on a fin-like structure on the engine to show what looks like several strips of duct tape.
A small amount of high velocity air connected to the side of the casting passes out through a nozzle, creating venturi action. This effect causes a large volume of low velocity air to flow through the venturi and out of the air diffuser. [4] The ratio of air supplied depends on the design of the air mover’s physical structure.
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Air-aspirating nozzles use an opening in the cone shaped nozzle to inject air into a stream of water based foam (CAFS/AFFF/FFFP) to make the concentrate "foam up". Most commonly found on foam extinguishers and foam handlines. Swirl nozzles inject the liquid in tangentially, and it spirals into the center and then exits through the central hole ...
Wind tunnel uses include assessing the effects of air on an aircraft in flight or a ground vehicle moving on land, and measuring the effect of wind on buildings and bridges. Wind tunnel test sections range in size from less than a foot across, to over 100 feet (30 m), and with air speeds from a light breeze to hypersonic.
The ejector nozzle is also able to use air which has been ingested by the intake but which is not required by the engine. The amount of this air varies significantly across the flight envelope and ejector nozzles are well suited to matching the airflow between the intake system and engine.
The pitot tube can be inserted through a small hole in the duct with the pitot connected to a U-tube water gauge or some other differential pressure gauge for determining the flow velocity inside the ducted wind tunnel. One use of this technique is to determine the volume of air that is being delivered to a conditioned space.